Machine for shelling rice and other grains



Aug.'7, 1945- I E, P. MILLER` .2,331,507

MACINE FOR SHELLING RICE AND OTHERI'GRAINS Filed July 29, 1944 's sheen-s heet` 1 31a/umm I E P. Miller v www4/u Aug. 7, 194s. E, R LLER 2,381,507

MACHINE FOR SHELLING RICE AND OIHER GRAINS Filed July 29, 1944 s sheets-sheet 2 ERMz'Zer www AUI 7 1945- P. MILLER- MACHINE FOR SHELLIG RICE' AND OTHER GRAINS Filed July 29, 1944 3 Sheets-Sheet 3 gime/wm RMV/ef ldriving roller arrow.

nulle 27 meneame-1,1945

Fon snELLrNG RICE ofrnaa Gams- Eloir route Miner, Ei campo, Tex. appueauo July 29, 1944,1.serie1 No. 541,166

' (ci. zia-35) 1 claim. l The object of my invention is to provide certain improvements in machines for shelling rice and other hard kernelled grains and particularly to make certain'improvements vin the machine' disclosed in Patent 2,211.096, patented August 13,

- v1940, to R'. H. Brown, and particularly to pro'-v v ide means for keeping'the ,speed of the respec' tive rollers which perform the shelling operation.

lower poney so which is mounted on e stub shaft 32 mounted between the double-sided frame 3| which `vat one end lspivoted on the stub shaft 34 which, in turn, is mountedy on bracket 33.A Nut 35 retains pivoted double frame 3| on stub shaft 34. l 'Y I provide a handwheel 36 affixed to the thread l ed shaft 3l which has a', threaded engagement relatively constant whereby to substantially inycrease,the-capacity'of the machine by five to y seven barrels per hour.

-I attain theobje'etives or my invention by, the

- mechanism y*illustrated in the accompanying drawings in which Figure 1 is a vertical section through tile machine? Fig. 2 is a sideelevation with the threaded piece 38'which is afllxed to theforward end ofthe pivoted double frame 3i. Threaded shaft `3'! has its-lower end' threaded in the extension 40 of bracket 39, whereby operation of the handwheel 38 will raise or lower the frame 3| and thus vchange the tension on belt 24,

ofthe machine and Fig. 3 is an end elevation of same. Like numerals designate like parts throughout the views and parts'which correspond with parts disclosed in Patent 2,211,096 are similarly numeralized. A

Referring to the drawings and. particularly to Fig. 1, -thefreme or the machine is indieeted by the `numeral I, the grain tobe shelled is fed in any suitable manner into the inlet' box 2, and

thence to feed box 3 and onto an inclined groovd feed plate 4. Above plate 4 is a fluted feed roller 5 which rotates in the direction indicated by the arrow, in a reverse direction to the flow ofthe grain. YThe grain then passes to a', relatively slow running endless band 8 which is within themachine and which travels over anvil roller 1 vand Abovethe anvil roller 1 is mounted a relatively fast running hard-shelling roller 9, provided with teeth 9a and rotating in the direction indicated by the arrow in Fig. 1. Beyond the roller 9 is a and, in turnyaiect the operation of 'shaft 26 on which belt 21 is mounted, and of driving `roller 8 which also is mounted on shaft 26. Member 4I is a jamb nut tobold the shaft 31 in adjusted position.' e

Positioned in al plane exteriorly of belt 24 is a. pulley 4-2'mounted'on shaft 2.5 and a pulley 43 mounted on shaft 26. These pulleys areoperatively connected by a nvel belt 44 of approximately V-shape in cross-section.` This belt 44 is taut at the top to hold the tension and is slack at the bottom when the rollers are spinning. The pulleys 42 and 43, which are on the outside of the A' frame of the machine, prevent the rubber belt 6 8 in the' direction indicated by the curved impact plate I3 which underlaps a curtain or apron II toguide the grain downwardly. An opening I'I in frame I permitsfthe inflow vcfa-current of air past the downflow of .grain to distribute the husked grain into compartment I3 land the husks into compartment I4. The current of air is sucked through passages I3 and I 4 by means of an intake fan 20 and fan-driving mechanism 2|.

Anvil roller 1 is mounted on shaft 2s end drivinfr roller l is mounted on shaft 26.

is also mounted 'on shaft 28 as shown in Fie. 2. l y Referring to Fig. 3, on the' power shaft 22`- is l mounted a pulley 23 over which'travels a belt A large 74. This-belt also extendsunder'large pulley 21 and over the upper pulley 23 which `is mounted on a bracket 2 3. Belt 24` then passesover a small which travels on the rollers 1 and 8 from excessive speedasthe grain passesbetween the corrugated, roller I 8I and theanvil lroller 1. Without some device to hold the tension and keep the sneed of the-respective rollers relativelyconstant there is a loss in efllciency of five to seven barrels an hour. The rubber belt 6 should run at a speed" of approximately 185 R. P. M. and the corrufcated roller Il at a speed of approximately 600 R. P. M. A constant ratio 'of speed between the rubber' belt `6 and the corrugated roller I 8 is main- .tained by the exertion of tension on the Atwo rollers 'land l;

Whatlclal'm is:

In apparatus of the type described, the coml bination cfa pair of spaced rollers, a slowly running grain-carrying belt of resilient material mounted on the rollers and to which the lwhole grain' is delivered, a high velocity shelling roller .having 'a'. hard and toothed surface mounted 'in closely spaced relation above the fbelt and ab'ove the one* of said'rollers over which grain is disg charged,v said shelling roller rotating in an opposite direction from the one said belt-carrying roller. to differentially rub and "shell grain between the surfaces of the belt and the'shellinfz roller. a shaft, drive receiving means` mounted' being mounted fast to a mid-portion ofthe shaft. a small diameter driving Pulley mounted atlthe other end of theshait.' a plurality oi' additional pulleys, -a drive belt travelling over said pulleys, one .of said nulleys being of a relatively large diameter and directly coupled t0 the other of l the pair of spacedrollers lso as to slowly drive the grain .carrying belt. a small diameter pulleyA mounted fast `izo the large pulley, `a second small l v 2,381,507 fast on one end of the shaft.` saijd shelling roller pulley ot size mounted fist to the other of 'the spaced pair of rollers. a second belt passim over said small pulleys, said second belt tendlng' to keep a relatively constant rotational speed the grain over the slowly running'grraln carrying 

